Isn’t a Hand Wash Safer?

Not really. Nothing is 100% safe but when we hand wash our cars at home or at a hand car wash, dirt from one end of the car accumulates on sponges or towels and act as a fine sandpaper (the sandpaper effect) on the rest of the car. If it’s a really dirty, we increase the pressure or scrub really hard on a stubborn spot. Ever notice cars with a swirling or circular pattern on their paint?...
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